Process in magnetic separation.



W. B. MOORE.

PROCESS IN MAGNETIC SEPARATION.

APPLICATION FILED AUG. 31, 1906.

Patented Nay 25, 1909.

Wi humus UNTTED STATS .ATENE OFFQE.

WALTER B. MOORE, OF SEATTLE, WASHINGTON.

PROCESS IN MAGNETIC SEPARATION.

Specification of Letters Patent.

Patented May 25, 190e.

Application tiled August 31, 1906. Serial No. 332,869.

. the following is a specification.

My invention relates to an improved method of treating mely dlvided materials carrying magnetic particles or magnetite for the purpose ot' separat-ing the magnetic lrom the non-magnetic particles.

T he invention has special reference to the treatment of sand or gangue containing magneticl iron ina granular or pulverulent form lor the purpose oi' separating lrom the mass the magnetic constituent. i

rlhe primary -object of my inventionis to rapidly and economically recover lall, or practically all, ol' the magnetic particles combined in masses ol material ot' the class j mentioned.

lt is also my object not only to rapidly recover the magnetic constituent but also to readily concentrate the same free from all non-magnetic particles.

ln carrying out my invention, the materials mixed with water to flow lreely, are directed to pass in suspension in the magnetic iield ol a magnetic separating means in which an electromagnet ol' suitable strength operates to attract and hold all ol the magnetic particles or magnetitc to a shield, while such of the non-magnetic particles not caught in magnetic entanglements are carried away by the water. As lfast as magnetic particles are extracter'l from the mass ol materials they are subjected to magnetic 'torce directed to cause the particles to leave the magnetic separating means and pass across an air gap or passage-way. This may be accomplished by employing )ermeable means acting in the magnetic ield ol' thc electro-magnet to concentrate lines oi' torce and operating the shield ol said magnet continuously to convey the particles drawn thereto into the iield ot' force oll said means. To concentrate the magnetic particles free i'rom the non-magnetic matter carried therewith in magnetic entanglements the particles are subjected 'to a rapid reversal ol' magnetic polarity to cause them to travel end over end, as they clear the air gap or passage-way, yto and across suitable supporting means. It is preferable that the magnetic particles should be kept constantly in a wet state throughout the process and lor this purpose water may be caused to iow. upon the particles asthey pass from the magnetic separating` means upon the support.

In t-he accompanying drawing there is disclosed one form oi' apparatus devised and constructed by me to carry out the abovel described process, said apparatus forming the subject of my application tor patent on magnetic separators prepared and executed i by me on even ldate herewith.

W 1th reference to the drawing, Figure l' is a vertical transverse section of the apparatus, and Fig. 2 is a side elevation of the same viewed from the right oi Fig. 1 pore tions of some oiI theparts being broken away.

The magnet-ic separating means, as shown, comprises an electro-magnet l, and a cylindrical shield 2, the former of which in operation, is connected with a suitable' electrical energizer in any convenient manner. The magnet is secured to a shaft 3 which fits rotatably in suitable hubs on the shield and is supported in a frame 4 for rotation. Secured to the shalt and shield are pulleys 5 and 5 respectively to which power is applied to rotate the magnet and shield independently of each other.

lReference numeral 6 indicates a conduitI communicating with a chamber 7, which embraces the lower portion of shield 2, and is provided with a discharge passage 8.

ln the magnetic iield, at the upwardly moving side of magnet 1 are permeable members 9 which are close to but not in contact with shield 2, and adjacent these members are. jet tubes 10 which are connected with a suitable delivery pipe and arranged to direct water for discharge toward respective members 9. Extending, each from its respective member 9, are supports 12, l2 and 12 the latter of which is provided with an upwardly inclined extension 14 and an opening at the base of said extension which communicates with a valve 15.

ln noperation the materials mixed with water are passed through conduit 6 into chamber 7 where the magnetic particles are drawn by magnet 1 to the shield 2, while the non-magnetizable matter overflows intof the discharge passage 8. As fast as the magnetic particles are extracted and drawn to the shield, they are carried into the field of force of the lower member 9 to which they fly and by rapid reversal of polarity, ei'ected 4 by the rotation of magnet 1, they are imme? members are immediate ticles, such non-magnetic matter as may be carried therewith in magnetic entangle- I claim. as new, and desire to secure by passage-Way, and then subjecting the partiments Will be freed and gravitate to the base of the extension 14, While the magnetic articles falling from the supports 12 Wil be caught on said extension and travel across the same in company with those particles passing from support 12', to a trough or receptacle 17.

Having thus described my invention, vhat retters .Patent of the United Statesof Amer- 1ca, 1s

1. The process of recovering magnet-ic particles associated With non-magnetic mate rials, which consists in feeding the massof materials into a magnetic field, subjecting the particles retained in the iield to an opposing magnetic force to movev them across a c les to a rapid reversal of magnetic polarity to cause them to travel end over end.

2.l The process of recovering magneticparticlesassociated with non-magnetic materials, which consists in feeding the mass of materials into a magnetic iield to extract the magnetic particles from theremainder, conveying the extracted magnetic particles, magnetically impelling the extracted particles across a passage-Wa directing a fluid on said particles and su jecting them to a rapid reversal of magnetic polarity to cause them to turn end over end.

3. The herein described process which consists in feeding the mass of materials into a Y magnetic ield to extract the magnetic particles from the remainder, impelling the extragted magnetic particles across a-passage- Way, then subjecting the magnetic articles .to a rapid reversal of magnetic po arity to cause them to turn end over end, and directing Water on said magnetic particles While they are turning end over end.

Signed-at Seattle, /Vashington this 23 day of August 1906. y A

Witnesses:

JOHN W. FILKINs, S. B. FOLEY.

l WALTER B. MooRE. i 

